1 // dwp.cc -- DWARF packaging utility
3 // Copyright (C) 2012-2016 Free Software Foundation, Inc.
4 // Written by Cary Coutant <ccoutant@google.com>.
6 // This file is part of dwp, the DWARF packaging utility.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
36 #include "libiberty.h"
37 #include "../bfd/bfdver.h"
40 #include "elfcpp_file.h"
42 #include "dirsearch.h"
45 #include "compressed_output.h"
46 #include "stringpool.h"
47 #include "dwarf_reader.h"
50 usage(FILE* fd, int) ATTRIBUTE_NORETURN;
53 print_version() ATTRIBUTE_NORETURN;
57 class Dwp_output_file;
59 template <int size, bool big_endian>
60 class Sized_relobj_dwo;
62 // List of .dwo files to process.
65 Dwo_file_entry(uint64_t id, std::string name)
66 : dwo_id(id), dwo_name(name)
71 typedef std::vector<Dwo_file_entry> File_list;
73 // Type to hold the offset and length of an input section
74 // within an output section.
78 section_offset_type offset;
79 section_size_type size;
85 Section_bounds(section_offset_type o, section_size_type s)
90 // A set of sections for a compilation unit or type unit.
95 Section_bounds sections[elfcpp::DW_SECT_MAX + 1];
98 : signature(0), sections()
103 // This class may represent a .dwo file, a .dwp file
104 // produced by an earlier run, or an executable file whose
105 // debug section identifies a set of .dwo files to read.
110 Dwo_file(const char* name)
111 : name_(name), obj_(NULL), input_file_(NULL), is_compressed_(),
112 sect_offsets_(), str_offset_map_()
117 // Read the input executable file and extract the list of .dwo files
118 // that it references.
120 read_executable(File_list* files);
122 // Read the input file and send its contents to OUTPUT_FILE.
124 read(Dwp_output_file* output_file);
126 // Verify a .dwp file given a list of .dwo files referenced by the
127 // corresponding executable file. Returns true if no problems
130 verify(const File_list& files);
133 // Types for mapping input string offsets to output string offsets.
134 typedef std::pair<section_offset_type, section_offset_type>
135 Str_offset_map_entry;
136 typedef std::vector<Str_offset_map_entry> Str_offset_map;
138 // A less-than comparison routine for Str_offset_map.
139 struct Offset_compare
142 operator()(const Str_offset_map_entry& i1,
143 const Str_offset_map_entry& i2) const
144 { return i1.first < i2.first; }
147 // Create a Sized_relobj_dwo of the given size and endianness,
148 // and record the target info. P is a pointer to the ELF header
151 make_object(Dwp_output_file* output_file);
153 template <int size, bool big_endian>
155 sized_make_object(const unsigned char* p, Input_file* input_file,
156 Dwp_output_file* output_file);
158 // Return the number of sections in the input object file.
161 { return this->obj_->shnum(); }
163 // Return section type.
165 section_type(unsigned int shndx)
166 { return this->obj_->section_type(shndx); }
168 // Get the name of a section.
170 section_name(unsigned int shndx)
171 { return this->obj_->section_name(shndx); }
173 // Return a view of the contents of a section, decompressed if necessary.
174 // Set *PLEN to the size. Set *IS_NEW to true if the contents need to be
175 // deleted by the caller.
177 section_contents(unsigned int shndx, section_size_type* plen, bool* is_new)
178 { return this->obj_->decompressed_section_contents(shndx, plen, is_new); }
180 // Read the .debug_cu_index or .debug_tu_index section of a .dwp file,
181 // and process the CU or TU sets.
183 read_unit_index(unsigned int, unsigned int *, Dwp_output_file*,
186 template <bool big_endian>
188 sized_read_unit_index(unsigned int, unsigned int *, Dwp_output_file*,
191 // Verify the .debug_cu_index section of a .dwp file, comparing it
192 // against the list of .dwo files referenced by the corresponding
195 verify_dwo_list(unsigned int, const File_list& files);
197 template <bool big_endian>
199 sized_verify_dwo_list(unsigned int, const File_list& files);
201 // Merge the input string table section into the output file.
203 add_strings(Dwp_output_file*, unsigned int);
205 // Copy a section from the input file to the output file.
207 copy_section(Dwp_output_file* output_file, unsigned int shndx,
208 elfcpp::DW_SECT section_id);
210 // Remap the string offsets in the .debug_str_offsets.dwo section.
212 remap_str_offsets(const unsigned char* contents, section_size_type len);
214 template <bool big_endian>
216 sized_remap_str_offsets(const unsigned char* contents, section_size_type len);
218 // Remap a single string offsets from an offset in the input string table
219 // to an offset in the output string table.
221 remap_str_offset(section_offset_type val);
223 // Add a set of .debug_info.dwo or .debug_types.dwo and related sections
226 add_unit_set(Dwp_output_file* output_file, unsigned int *debug_shndx,
227 bool is_debug_types);
231 // The ELF file, represented as a gold Relobj instance.
233 // The Input_file object.
234 Input_file* input_file_;
235 // Flags indicating which sections are compressed.
236 std::vector<bool> is_compressed_;
237 // Map input section index onto output section offset and size.
238 std::vector<Section_bounds> sect_offsets_;
239 // Map input string offsets to output string offsets.
240 Str_offset_map str_offset_map_;
243 // An ELF input file.
244 // We derive from Sized_relobj so that we can use interfaces
245 // in libgold to access the file.
247 template <int size, bool big_endian>
248 class Sized_relobj_dwo : public Sized_relobj<size, big_endian>
251 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
252 typedef typename Sized_relobj<size, big_endian>::Symbols Symbols;
254 Sized_relobj_dwo(const char* name, Input_file* input_file,
255 const elfcpp::Ehdr<size, big_endian>& ehdr)
256 : Sized_relobj<size, big_endian>(name, input_file),
257 elf_file_(this, ehdr)
263 // Setup the section information.
268 // Return section type.
270 do_section_type(unsigned int shndx)
271 { return this->elf_file_.section_type(shndx); }
273 // Get the name of a section.
275 do_section_name(unsigned int shndx) const
276 { return this->elf_file_.section_name(shndx); }
278 // Get the size of a section.
280 do_section_size(unsigned int shndx)
281 { return this->elf_file_.section_size(shndx); }
283 // Return a view of the contents of a section.
285 do_section_contents(unsigned int, section_size_type*, bool);
287 // The following virtual functions are abstract in the base classes,
288 // but are not used here.
292 do_read_symbols(Read_symbols_data*)
293 { gold_unreachable(); }
295 // Lay out the input sections.
297 do_layout(Symbol_table*, Layout*, Read_symbols_data*)
298 { gold_unreachable(); }
300 // Layout sections whose layout was deferred while waiting for
301 // input files from a plugin.
303 do_layout_deferred_sections(Layout*)
304 { gold_unreachable(); }
306 // Add the symbols to the symbol table.
308 do_add_symbols(Symbol_table*, Read_symbols_data*, Layout*)
309 { gold_unreachable(); }
311 Archive::Should_include
312 do_should_include_member(Symbol_table*, Layout*, Read_symbols_data*,
314 { gold_unreachable(); }
316 // Iterate over global symbols, calling a visitor class V for each.
318 do_for_all_global_symbols(Read_symbols_data*,
319 Library_base::Symbol_visitor_base*)
320 { gold_unreachable(); }
322 // Return section flags.
324 do_section_flags(unsigned int)
325 { gold_unreachable(); }
327 // Return section entsize.
329 do_section_entsize(unsigned int)
330 { gold_unreachable(); }
332 // Return section address.
334 do_section_address(unsigned int)
335 { gold_unreachable(); }
337 // Return the section link field.
339 do_section_link(unsigned int)
340 { gold_unreachable(); }
342 // Return the section link field.
344 do_section_info(unsigned int)
345 { gold_unreachable(); }
347 // Return the section alignment.
349 do_section_addralign(unsigned int)
350 { gold_unreachable(); }
352 // Return the Xindex structure to use.
354 do_initialize_xindex()
355 { gold_unreachable(); }
357 // Get symbol counts.
359 do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const
360 { gold_unreachable(); }
362 // Get global symbols.
364 do_get_global_symbols() const
367 // Return the value of a local symbol.
369 do_local_symbol_value(unsigned int, uint64_t) const
370 { gold_unreachable(); }
373 do_local_plt_offset(unsigned int) const
374 { gold_unreachable(); }
376 // Return whether local symbol SYMNDX is a TLS symbol.
378 do_local_is_tls(unsigned int) const
379 { gold_unreachable(); }
381 // Return the number of local symbols.
383 do_local_symbol_count() const
384 { gold_unreachable(); }
386 // Return the number of local symbols in the output symbol table.
388 do_output_local_symbol_count() const
389 { gold_unreachable(); }
391 // Return the file offset for local symbols in the output symbol table.
393 do_local_symbol_offset() const
394 { gold_unreachable(); }
398 do_read_relocs(Read_relocs_data*)
399 { gold_unreachable(); }
401 // Process the relocs to find list of referenced sections. Used only
402 // during garbage collection.
404 do_gc_process_relocs(Symbol_table*, Layout*, Read_relocs_data*)
405 { gold_unreachable(); }
407 // Scan the relocs and adjust the symbol table.
409 do_scan_relocs(Symbol_table*, Layout*, Read_relocs_data*)
410 { gold_unreachable(); }
412 // Count the local symbols.
414 do_count_local_symbols(Stringpool_template<char>*,
415 Stringpool_template<char>*)
416 { gold_unreachable(); }
418 // Finalize the local symbols.
420 do_finalize_local_symbols(unsigned int, off_t, Symbol_table*)
421 { gold_unreachable(); }
423 // Set the offset where local dynamic symbol information will be stored.
425 do_set_local_dynsym_indexes(unsigned int)
426 { gold_unreachable(); }
428 // Set the offset where local dynamic symbol information will be stored.
430 do_set_local_dynsym_offset(off_t)
431 { gold_unreachable(); }
433 // Relocate the input sections and write out the local symbols.
435 do_relocate(const Symbol_table*, const Layout*, Output_file*)
436 { gold_unreachable(); }
439 // General access to the ELF file.
440 elfcpp::Elf_file<size, big_endian, Object> elf_file_;
444 // This class is responsible for collecting the debug index information
445 // and writing the .dwp file in ELF format.
447 class Dwp_output_file
450 Dwp_output_file(const char* name)
451 : name_(name), machine_(0), size_(0), big_endian_(false), osabi_(0),
452 abiversion_(0), fd_(NULL), next_file_offset_(0), shnum_(1), sections_(),
453 section_id_map_(), shoff_(0), shstrndx_(0), have_strings_(false),
454 stringpool_(), shstrtab_(), cu_index_(), tu_index_(), last_type_sig_(0),
457 this->section_id_map_.resize(elfcpp::DW_SECT_MAX + 1);
458 this->stringpool_.set_no_zero_null();
461 // Record the target info from an input file.
463 record_target_info(const char* name, int machine, int size, bool big_endian,
464 int osabi, int abiversion);
466 // Add a string to the debug strings section.
468 add_string(const char* str, size_t len);
470 // Add a section to the output file, and return the new section offset.
472 add_contribution(elfcpp::DW_SECT section_id, const unsigned char* contents,
473 section_size_type len, int align);
475 // Add a set of .debug_info and related sections to the output file.
477 add_cu_set(Unit_set* cu_set);
479 // Lookup a type signature and return TRUE if we have already seen it.
481 lookup_tu(uint64_t type_sig);
483 // Add a set of .debug_types and related sections to the output file.
485 add_tu_set(Unit_set* tu_set);
487 // Finalize the file, write the string tables and index sections,
488 // and close the file.
493 // Contributions to output sections.
496 section_offset_type output_offset;
497 section_size_type size;
498 const unsigned char* contents;
501 // Sections in the output file.
506 section_size_type size;
508 std::vector<Contribution> contributions;
510 Section(const char* n, int a)
511 : name(n), offset(0), size(0), align(a), contributions()
515 // The index sections defined by the DWARF Package File Format spec.
519 // Vector for the section table.
520 typedef std::vector<const Unit_set*> Section_table;
523 : capacity_(0), used_(0), hash_table_(NULL), section_table_(),
530 // Find a slot in the hash table for SIGNATURE. Return TRUE
531 // if the entry already exists.
533 find_or_add(uint64_t signature, unsigned int* slotp);
535 // Enter a CU or TU set at the given SLOT in the hash table.
537 enter_set(unsigned int slot, const Unit_set* set);
539 // Return the contents of the given SLOT in the hash table of signatures.
541 hash_table(unsigned int slot) const
542 { return this->hash_table_[slot]; }
544 // Return the contents of the given SLOT in the parallel table of
545 // shndx pool indexes.
547 index_table(unsigned int slot) const
548 { return this->index_table_[slot]; }
550 // Return the total number of slots in the hash table.
552 hash_table_total_slots() const
553 { return this->capacity_; }
555 // Return the number of used slots in the hash table.
557 hash_table_used_slots() const
558 { return this->used_; }
560 // Return an iterator into the shndx pool.
561 Section_table::const_iterator
562 section_table() const
563 { return this->section_table_.begin(); }
565 Section_table::const_iterator
566 section_table_end() const
567 { return this->section_table_.end(); }
569 // Return the number of rows in the section table.
571 section_table_rows() const
572 { return this->section_table_.size(); }
574 // Return the mask indicating which columns will be used
575 // in the section table.
577 section_table_cols() const
578 { return this->section_mask_; }
581 // Initialize the hash table.
585 // Grow the hash table when we reach 2/3 capacity.
589 // The number of slots in the table, a power of 2 such that
590 // capacity > 3 * size / 2.
591 unsigned int capacity_;
592 // The current number of used slots in the hash table.
594 // The storage for the hash table of signatures.
595 uint64_t* hash_table_;
596 // The storage for the parallel table of shndx pool indexes.
597 uint32_t* index_table_;
598 // The table of section offsets and sizes.
599 Section_table section_table_;
600 // Bit mask to indicate which debug sections are present in the file.
602 }; // End class Dwp_output_file::Dwp_index.
604 // Add a new output section and return the section index.
606 add_output_section(const char* section_name, int align);
608 // Write a new section to the output file.
610 write_new_section(const char* section_name, const unsigned char* contents,
611 section_size_type len, int align);
613 // Write the ELF header.
617 template<unsigned int size, bool big_endian>
621 // Write a section header.
623 write_shdr(const char* name, unsigned int type, unsigned int flags,
624 uint64_t addr, off_t offset, section_size_type sect_size,
625 unsigned int link, unsigned int info,
626 unsigned int align, unsigned int ent_size);
628 template<unsigned int size, bool big_endian>
630 sized_write_shdr(const char* name, unsigned int type, unsigned int flags,
631 uint64_t addr, off_t offset, section_size_type sect_size,
632 unsigned int link, unsigned int info,
633 unsigned int align, unsigned int ent_size);
635 // Write the contributions to an output section.
637 write_contributions(const Section& sect);
639 // Write a CU or TU index section.
640 template<bool big_endian>
642 write_index(const char* sect_name, const Dwp_index& index);
644 // The output filename.
646 // ELF header parameters.
652 // The output file descriptor.
654 // Next available file offset.
655 off_t next_file_offset_;
656 // The number of sections.
658 // Section table. The first entry is shndx 1.
659 std::vector<Section> sections_;
660 // Section id map. This maps a DW_SECT enum to an shndx.
661 std::vector<unsigned int> section_id_map_;
662 // File offset of the section header table.
664 // Section index of the section string table.
665 unsigned int shstrndx_;
666 // TRUE if we have added any strings to the string pool.
668 // String pool for the output .debug_str.dwo section.
669 Stringpool stringpool_;
670 // String pool for the .shstrtab section.
671 Stringpool shstrtab_;
672 // The compilation unit index.
674 // The type unit index.
676 // Cache of the last type signature looked up.
677 uint64_t last_type_sig_;
678 // Cache of the slot index for the last type signature.
679 unsigned int last_tu_slot_;
682 // A specialization of Dwarf_info_reader, for reading dwo_names from
685 class Dwo_name_info_reader : public Dwarf_info_reader
688 Dwo_name_info_reader(Relobj* object, unsigned int shndx)
689 : Dwarf_info_reader(false, object, NULL, 0, shndx, 0, 0),
693 ~Dwo_name_info_reader()
696 // Get the dwo_names from the DWARF compilation unit DIEs.
698 get_dwo_names(File_list* files)
700 this->files_ = files;
705 // Visit a compilation unit.
707 visit_compilation_unit(off_t cu_offset, off_t cu_length, Dwarf_die*);
710 // The list of files to populate.
714 // A specialization of Dwarf_info_reader, for reading DWARF CUs and TUs
715 // and adding them to the output file.
717 class Unit_reader : public Dwarf_info_reader
720 Unit_reader(bool is_type_unit, Relobj* object, unsigned int shndx)
721 : Dwarf_info_reader(is_type_unit, object, NULL, 0, shndx, 0, 0),
722 output_file_(NULL), sections_(NULL)
728 // Read the CUs or TUs and add them to the output file.
730 add_units(Dwp_output_file*, unsigned int debug_abbrev, Section_bounds*);
733 // Visit a compilation unit.
735 visit_compilation_unit(off_t cu_offset, off_t cu_length, Dwarf_die*);
737 // Visit a type unit.
739 visit_type_unit(off_t tu_offset, off_t tu_length, off_t type_offset,
740 uint64_t signature, Dwarf_die*);
743 Dwp_output_file* output_file_;
744 Section_bounds* sections_;
747 // Return the name of a DWARF .dwo section.
750 get_dwarf_section_name(elfcpp::DW_SECT section_id)
752 static const char* dwarf_section_names[] = {
754 ".debug_info.dwo", // DW_SECT_INFO = 1
755 ".debug_types.dwo", // DW_SECT_TYPES = 2
756 ".debug_abbrev.dwo", // DW_SECT_ABBREV = 3
757 ".debug_line.dwo", // DW_SECT_LINE = 4
758 ".debug_loc.dwo", // DW_SECT_LOC = 5
759 ".debug_str_offsets.dwo", // DW_SECT_STR_OFFSETS = 6
760 ".debug_macinfo.dwo", // DW_SECT_MACINFO = 7
761 ".debug_macro.dwo", // DW_SECT_MACRO = 8
764 gold_assert(section_id > 0 && section_id <= elfcpp::DW_SECT_MAX);
765 return dwarf_section_names[section_id];
768 // Class Sized_relobj_dwo.
770 // Setup the section information.
772 template <int size, bool big_endian>
774 Sized_relobj_dwo<size, big_endian>::setup()
776 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
777 const off_t shoff = this->elf_file_.shoff();
778 const unsigned int shnum = this->elf_file_.shnum();
780 this->set_shnum(shnum);
781 this->section_offsets().resize(shnum);
783 // Read the section headers.
784 const unsigned char* const pshdrs = this->get_view(shoff, shnum * shdr_size,
787 // Read the section names.
788 const unsigned char* pshdrnames =
789 pshdrs + this->elf_file_.shstrndx() * shdr_size;
790 typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames);
791 if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB)
792 this->error(_("section name section has wrong type: %u"),
793 static_cast<unsigned int>(shdrnames.get_sh_type()));
794 section_size_type section_names_size =
795 convert_to_section_size_type(shdrnames.get_sh_size());
796 const unsigned char* namesu = this->get_view(shdrnames.get_sh_offset(),
797 section_names_size, false,
799 const char* names = reinterpret_cast<const char*>(namesu);
801 Compressed_section_map* compressed_sections =
802 build_compressed_section_map<size, big_endian>(
803 pshdrs, this->shnum(), names, section_names_size, this, true);
804 if (compressed_sections != NULL && !compressed_sections->empty())
805 this->set_compressed_sections(compressed_sections);
808 // Return a view of the contents of a section.
810 template <int size, bool big_endian>
812 Sized_relobj_dwo<size, big_endian>::do_section_contents(
814 section_size_type* plen,
817 Object::Location loc(this->elf_file_.section_contents(shndx));
818 *plen = convert_to_section_size_type(loc.data_size);
821 static const unsigned char empty[1] = { '\0' };
824 return this->get_view(loc.file_offset, *plen, true, cache);
829 Dwo_file::~Dwo_file()
831 if (this->obj_ != NULL)
833 if (this->input_file_ != NULL)
834 delete this->input_file_;
837 // Read the input executable file and extract the list of .dwo files
838 // that it references.
841 Dwo_file::read_executable(File_list* files)
843 this->obj_ = this->make_object(NULL);
845 unsigned int shnum = this->shnum();
846 this->is_compressed_.resize(shnum);
847 this->sect_offsets_.resize(shnum);
849 unsigned int debug_info = 0;
850 unsigned int debug_abbrev = 0;
852 // Scan the section table and collect the debug sections we need.
853 // (Section index 0 is a dummy section; skip it.)
854 for (unsigned int i = 1; i < shnum; i++)
856 if (this->section_type(i) != elfcpp::SHT_PROGBITS)
858 std::string sect_name = this->section_name(i);
859 const char* suffix = sect_name.c_str();
860 if (is_prefix_of(".debug_", suffix))
862 else if (is_prefix_of(".zdebug_", suffix))
864 this->is_compressed_[i] = true;
869 if (strcmp(suffix, "info") == 0)
871 else if (strcmp(suffix, "abbrev") == 0)
877 Dwo_name_info_reader dwarf_reader(this->obj_, debug_info);
878 dwarf_reader.set_abbrev_shndx(debug_abbrev);
879 dwarf_reader.get_dwo_names(files);
883 // Read the input file and send its contents to OUTPUT_FILE.
886 Dwo_file::read(Dwp_output_file* output_file)
888 this->obj_ = this->make_object(output_file);
890 unsigned int shnum = this->shnum();
891 this->is_compressed_.resize(shnum);
892 this->sect_offsets_.resize(shnum);
894 typedef std::vector<unsigned int> Types_list;
895 Types_list debug_types;
896 unsigned int debug_shndx[elfcpp::DW_SECT_MAX + 1];
897 for (unsigned int i = 0; i <= elfcpp::DW_SECT_MAX; i++)
899 unsigned int debug_str = 0;
900 unsigned int debug_cu_index = 0;
901 unsigned int debug_tu_index = 0;
903 // Scan the section table and collect debug sections.
904 // (Section index 0 is a dummy section; skip it.)
905 for (unsigned int i = 1; i < shnum; i++)
907 if (this->section_type(i) != elfcpp::SHT_PROGBITS)
909 std::string sect_name = this->section_name(i);
910 const char* suffix = sect_name.c_str();
911 if (is_prefix_of(".debug_", suffix))
913 else if (is_prefix_of(".zdebug_", suffix))
915 this->is_compressed_[i] = true;
920 if (strcmp(suffix, "info.dwo") == 0)
921 debug_shndx[elfcpp::DW_SECT_INFO] = i;
922 else if (strcmp(suffix, "types.dwo") == 0)
923 debug_types.push_back(i);
924 else if (strcmp(suffix, "abbrev.dwo") == 0)
925 debug_shndx[elfcpp::DW_SECT_ABBREV] = i;
926 else if (strcmp(suffix, "line.dwo") == 0)
927 debug_shndx[elfcpp::DW_SECT_LINE] = i;
928 else if (strcmp(suffix, "loc.dwo") == 0)
929 debug_shndx[elfcpp::DW_SECT_LOC] = i;
930 else if (strcmp(suffix, "str.dwo") == 0)
932 else if (strcmp(suffix, "str_offsets.dwo") == 0)
933 debug_shndx[elfcpp::DW_SECT_STR_OFFSETS] = i;
934 else if (strcmp(suffix, "macinfo.dwo") == 0)
935 debug_shndx[elfcpp::DW_SECT_MACINFO] = i;
936 else if (strcmp(suffix, "macro.dwo") == 0)
937 debug_shndx[elfcpp::DW_SECT_MACRO] = i;
938 else if (strcmp(suffix, "cu_index") == 0)
940 else if (strcmp(suffix, "tu_index") == 0)
944 // Merge the input string table into the output string table.
945 this->add_strings(output_file, debug_str);
947 // If we found any .dwp index sections, read those and add the section
948 // sets to the output file.
949 if (debug_cu_index > 0 || debug_tu_index > 0)
951 if (debug_cu_index > 0)
952 this->read_unit_index(debug_cu_index, debug_shndx, output_file, false);
953 if (debug_tu_index > 0)
955 if (debug_types.size() > 1)
956 gold_fatal(_("%s: .dwp file must have no more than one "
957 ".debug_types.dwo section"), this->name_);
958 if (debug_types.size() == 1)
959 debug_shndx[elfcpp::DW_SECT_TYPES] = debug_types[0];
961 debug_shndx[elfcpp::DW_SECT_TYPES] = 0;
962 this->read_unit_index(debug_tu_index, debug_shndx, output_file, true);
967 // If we found no index sections, this is a .dwo file.
968 if (debug_shndx[elfcpp::DW_SECT_INFO] > 0)
969 this->add_unit_set(output_file, debug_shndx, false);
971 debug_shndx[elfcpp::DW_SECT_INFO] = 0;
972 for (Types_list::const_iterator tp = debug_types.begin();
973 tp != debug_types.end();
976 debug_shndx[elfcpp::DW_SECT_TYPES] = *tp;
977 this->add_unit_set(output_file, debug_shndx, true);
981 // Verify a .dwp file given a list of .dwo files referenced by the
982 // corresponding executable file. Returns true if no problems
986 Dwo_file::verify(const File_list& files)
988 this->obj_ = this->make_object(NULL);
990 unsigned int shnum = this->shnum();
991 this->is_compressed_.resize(shnum);
992 this->sect_offsets_.resize(shnum);
994 unsigned int debug_cu_index = 0;
996 // Scan the section table and collect debug sections.
997 // (Section index 0 is a dummy section; skip it.)
998 for (unsigned int i = 1; i < shnum; i++)
1000 if (this->section_type(i) != elfcpp::SHT_PROGBITS)
1002 std::string sect_name = this->section_name(i);
1003 const char* suffix = sect_name.c_str();
1004 if (is_prefix_of(".debug_", suffix))
1006 else if (is_prefix_of(".zdebug_", suffix))
1008 this->is_compressed_[i] = true;
1013 if (strcmp(suffix, "cu_index") == 0)
1017 if (debug_cu_index == 0)
1018 gold_fatal(_("%s: no .debug_cu_index section found"), this->name_);
1020 return this->verify_dwo_list(debug_cu_index, files);
1023 // Create a Sized_relobj_dwo of the given size and endianness,
1024 // and record the target info.
1027 Dwo_file::make_object(Dwp_output_file* output_file)
1029 // Open the input file.
1030 Input_file* input_file = new Input_file(this->name_);
1031 this->input_file_ = input_file;
1034 if (!input_file->open(dirpath, NULL, &index))
1035 gold_fatal(_("%s: can't open"), this->name_);
1037 // Check that it's an ELF file.
1038 off_t filesize = input_file->file().filesize();
1039 int hdrsize = elfcpp::Elf_recognizer::max_header_size;
1040 if (filesize < hdrsize)
1042 const unsigned char* elf_header =
1043 input_file->file().get_view(0, 0, hdrsize, true, false);
1044 if (!elfcpp::Elf_recognizer::is_elf_file(elf_header, hdrsize))
1045 gold_fatal(_("%s: not an ELF object file"), this->name_);
1047 // Get the size, endianness, machine, etc. info from the header,
1048 // make an appropriately-sized Relobj, and pass the target info
1049 // to the output object.
1053 if (!elfcpp::Elf_recognizer::is_valid_header(elf_header, hdrsize, &size,
1054 &big_endian, &error))
1055 gold_fatal(_("%s: %s"), this->name_, error.c_str());
1060 #ifdef HAVE_TARGET_32_BIG
1061 return this->sized_make_object<32, true>(elf_header, input_file,
1067 #ifdef HAVE_TARGET_32_LITTLE
1068 return this->sized_make_object<32, false>(elf_header, input_file,
1074 else if (size == 64)
1077 #ifdef HAVE_TARGET_64_BIG
1078 return this->sized_make_object<64, true>(elf_header, input_file,
1084 #ifdef HAVE_TARGET_64_LITTLE
1085 return this->sized_make_object<64, false>(elf_header, input_file,
1095 // Function template to create a Sized_relobj_dwo and record the target info.
1096 // P is a pointer to the ELF header in memory.
1098 template <int size, bool big_endian>
1100 Dwo_file::sized_make_object(const unsigned char* p, Input_file* input_file,
1101 Dwp_output_file* output_file)
1103 elfcpp::Ehdr<size, big_endian> ehdr(p);
1104 Sized_relobj_dwo<size, big_endian>* obj =
1105 new Sized_relobj_dwo<size, big_endian>(this->name_, input_file, ehdr);
1107 if (output_file != NULL)
1108 output_file->record_target_info(
1109 this->name_, ehdr.get_e_machine(), size, big_endian,
1110 ehdr.get_e_ident()[elfcpp::EI_OSABI],
1111 ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]);
1115 // Read the .debug_cu_index or .debug_tu_index section of a .dwp file,
1116 // and process the CU or TU sets.
1119 Dwo_file::read_unit_index(unsigned int shndx, unsigned int *debug_shndx,
1120 Dwp_output_file* output_file, bool is_tu_index)
1122 if (this->obj_->is_big_endian())
1123 this->sized_read_unit_index<true>(shndx, debug_shndx, output_file,
1126 this->sized_read_unit_index<false>(shndx, debug_shndx, output_file,
1130 template <bool big_endian>
1132 Dwo_file::sized_read_unit_index(unsigned int shndx,
1133 unsigned int *debug_shndx,
1134 Dwp_output_file* output_file,
1137 elfcpp::DW_SECT info_sect = (is_tu_index
1138 ? elfcpp::DW_SECT_TYPES
1139 : elfcpp::DW_SECT_INFO);
1140 unsigned int info_shndx = debug_shndx[info_sect];
1142 gold_assert(shndx > 0);
1144 section_size_type index_len;
1146 const unsigned char* contents =
1147 this->section_contents(shndx, &index_len, &index_is_new);
1149 unsigned int version =
1150 elfcpp::Swap_unaligned<32, big_endian>::readval(contents);
1152 // We don't support version 1 anymore because it was experimental
1153 // and because in normal use, dwp is not expected to read .dwp files
1154 // produced by an earlier version of the tool.
1156 gold_fatal(_("%s: section %s has unsupported version number %d"),
1157 this->name_, this->section_name(shndx).c_str(), version);
1159 unsigned int ncols =
1160 elfcpp::Swap_unaligned<32, big_endian>::readval(contents
1161 + sizeof(uint32_t));
1162 unsigned int nused =
1163 elfcpp::Swap_unaligned<32, big_endian>::readval(contents
1164 + 2 * sizeof(uint32_t));
1165 if (ncols == 0 || nused == 0)
1168 gold_assert(info_shndx > 0);
1170 unsigned int nslots =
1171 elfcpp::Swap_unaligned<32, big_endian>::readval(contents
1172 + 3 * sizeof(uint32_t));
1174 const unsigned char* phash = contents + 4 * sizeof(uint32_t);
1175 const unsigned char* pindex = phash + nslots * sizeof(uint64_t);
1176 const unsigned char* pcolhdrs = pindex + nslots * sizeof(uint32_t);
1177 const unsigned char* poffsets = pcolhdrs + ncols * sizeof(uint32_t);
1178 const unsigned char* psizes = poffsets + nused * ncols * sizeof(uint32_t);
1179 const unsigned char* pend = psizes + nused * ncols * sizeof(uint32_t);
1181 if (pend > contents + index_len)
1182 gold_fatal(_("%s: section %s is corrupt"), this->name_,
1183 this->section_name(shndx).c_str());
1185 // Copy the related sections and track the section offsets and sizes.
1186 Section_bounds sections[elfcpp::DW_SECT_MAX + 1];
1187 for (int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i)
1189 if (debug_shndx[i] > 0)
1190 sections[i] = this->copy_section(output_file, debug_shndx[i],
1191 static_cast<elfcpp::DW_SECT>(i));
1194 // Get the contents of the .debug_info.dwo or .debug_types.dwo section.
1195 section_size_type info_len;
1197 const unsigned char* info_contents =
1198 this->section_contents(info_shndx, &info_len, &info_is_new);
1200 // Loop over the slots of the hash table.
1201 for (unsigned int i = 0; i < nslots; ++i)
1203 uint64_t signature =
1204 elfcpp::Swap_unaligned<64, big_endian>::readval(phash);
1205 unsigned int index =
1206 elfcpp::Swap_unaligned<32, big_endian>::readval(pindex);
1207 if (index != 0 && (!is_tu_index || !output_file->lookup_tu(signature)))
1209 Unit_set* unit_set = new Unit_set();
1210 unit_set->signature = signature;
1211 const unsigned char* pch = pcolhdrs;
1212 const unsigned char* porow =
1213 poffsets + (index - 1) * ncols * sizeof(uint32_t);
1214 const unsigned char* psrow =
1215 psizes + (index - 1) * ncols * sizeof(uint32_t);
1217 // Adjust the offset of each contribution within the input section
1218 // by the offset of the input section within the output section.
1219 for (unsigned int j = 0; j <= ncols; j++)
1221 unsigned int dw_sect =
1222 elfcpp::Swap_unaligned<64, big_endian>::readval(pch);
1223 unsigned int offset =
1224 elfcpp::Swap_unaligned<64, big_endian>::readval(porow);
1226 elfcpp::Swap_unaligned<64, big_endian>::readval(psrow);
1227 unit_set->sections[dw_sect].offset = (sections[dw_sect].offset
1229 unit_set->sections[dw_sect].size = size;
1230 pch += sizeof(uint32_t);
1231 porow += sizeof(uint32_t);
1232 psrow += sizeof(uint32_t);
1235 const unsigned char* unit_start =
1236 info_contents + unit_set->sections[info_sect].offset;
1237 section_size_type unit_length = unit_set->sections[info_sect].size;
1239 // Dwp_output_file::add_contribution writes the .debug_info.dwo
1240 // section directly to the output file, so we only need to
1241 // duplicate contributions for .debug_types.dwo section.
1244 unsigned char *copy = new unsigned char[unit_length];
1245 memcpy(copy, unit_start, unit_length);
1248 section_offset_type off =
1249 output_file->add_contribution(info_sect, unit_start,
1251 unit_set->sections[info_sect].offset = off;
1253 output_file->add_tu_set(unit_set);
1255 output_file->add_cu_set(unit_set);
1257 phash += sizeof(uint64_t);
1258 pindex += sizeof(uint32_t);
1264 delete[] info_contents;
1267 // Verify the .debug_cu_index section of a .dwp file, comparing it
1268 // against the list of .dwo files referenced by the corresponding
1272 Dwo_file::verify_dwo_list(unsigned int shndx, const File_list& files)
1274 if (this->obj_->is_big_endian())
1275 return this->sized_verify_dwo_list<true>(shndx, files);
1277 return this->sized_verify_dwo_list<false>(shndx, files);
1280 template <bool big_endian>
1282 Dwo_file::sized_verify_dwo_list(unsigned int shndx, const File_list& files)
1284 gold_assert(shndx > 0);
1286 section_size_type index_len;
1288 const unsigned char* contents =
1289 this->section_contents(shndx, &index_len, &index_is_new);
1291 unsigned int version =
1292 elfcpp::Swap_unaligned<32, big_endian>::readval(contents);
1294 // We don't support version 1 anymore because it was experimental
1295 // and because in normal use, dwp is not expected to read .dwp files
1296 // produced by an earlier version of the tool.
1298 gold_fatal(_("%s: section %s has unsupported version number %d"),
1299 this->name_, this->section_name(shndx).c_str(), version);
1301 unsigned int ncols =
1302 elfcpp::Swap_unaligned<32, big_endian>::readval(contents
1303 + sizeof(uint32_t));
1304 unsigned int nused =
1305 elfcpp::Swap_unaligned<32, big_endian>::readval(contents
1306 + 2 * sizeof(uint32_t));
1307 if (ncols == 0 || nused == 0)
1310 unsigned int nslots =
1311 elfcpp::Swap_unaligned<32, big_endian>::readval(contents
1312 + 3 * sizeof(uint32_t));
1314 const unsigned char* phash = contents + 4 * sizeof(uint32_t);
1315 const unsigned char* pindex = phash + nslots * sizeof(uint64_t);
1316 const unsigned char* pcolhdrs = pindex + nslots * sizeof(uint32_t);
1317 const unsigned char* poffsets = pcolhdrs + ncols * sizeof(uint32_t);
1318 const unsigned char* psizes = poffsets + nused * ncols * sizeof(uint32_t);
1319 const unsigned char* pend = psizes + nused * ncols * sizeof(uint32_t);
1321 if (pend > contents + index_len)
1322 gold_fatal(_("%s: section %s is corrupt"), this->name_,
1323 this->section_name(shndx).c_str());
1326 for (File_list::const_iterator f = files.begin(); f != files.end(); ++f)
1328 uint64_t dwo_id = f->dwo_id;
1329 unsigned int slot = static_cast<unsigned int>(dwo_id) & (nslots - 1);
1330 const unsigned char* ph = phash + slot * sizeof(uint64_t);
1331 const unsigned char* pi = pindex + slot * sizeof(uint32_t);
1332 uint64_t probe = elfcpp::Swap_unaligned<64, big_endian>::readval(ph);
1333 uint32_t row_index = elfcpp::Swap_unaligned<32, big_endian>::readval(pi);
1334 if (row_index != 0 && probe != dwo_id)
1336 unsigned int h2 = ((static_cast<unsigned int>(dwo_id >> 32)
1337 & (nslots - 1)) | 1);
1340 slot = (slot + h2) & (nslots - 1);
1341 ph = phash + slot * sizeof(uint64_t);
1342 pi = pindex + slot * sizeof(uint32_t);
1343 probe = elfcpp::Swap_unaligned<64, big_endian>::readval(ph);
1344 row_index = elfcpp::Swap_unaligned<32, big_endian>::readval(pi);
1345 } while (row_index != 0 && probe != dwo_id);
1349 printf(_("missing .dwo file: %016llx %s\n"),
1350 static_cast<long long>(dwo_id), f->dwo_name.c_str());
1355 gold_info(_("Found %d missing .dwo files"), nmissing);
1360 return nmissing == 0;
1363 // Merge the input string table section into the output file.
1366 Dwo_file::add_strings(Dwp_output_file* output_file, unsigned int debug_str)
1368 section_size_type len;
1370 const unsigned char* pdata = this->section_contents(debug_str, &len, &is_new);
1371 const char* p = reinterpret_cast<const char*>(pdata);
1372 const char* pend = p + len;
1374 // Check that the last string is null terminated.
1375 if (pend[-1] != '\0')
1376 gold_fatal(_("%s: last entry in string section '%s' "
1377 "is not null terminated"),
1379 this->section_name(debug_str).c_str());
1381 // Count the number of strings in the section, and size the map.
1383 for (const char* pt = p; pt < pend; pt += strlen(pt) + 1)
1385 this->str_offset_map_.reserve(count + 1);
1387 // Add the strings to the output string table, and record the new offsets
1389 section_offset_type i = 0;
1390 section_offset_type new_offset;
1393 size_t len = strlen(p);
1394 new_offset = output_file->add_string(p, len);
1395 this->str_offset_map_.push_back(std::make_pair(i, new_offset));
1400 this->str_offset_map_.push_back(std::make_pair(i, new_offset));
1405 // Copy a section from the input file to the output file.
1406 // Return the offset and length of this input section's contribution
1407 // in the output section. If copying .debug_str_offsets.dwo, remap
1408 // the string offsets for the output string table.
1411 Dwo_file::copy_section(Dwp_output_file* output_file, unsigned int shndx,
1412 elfcpp::DW_SECT section_id)
1414 // Some sections may be referenced from more than one set.
1415 // Don't copy a section more than once.
1416 if (this->sect_offsets_[shndx].size > 0)
1417 return this->sect_offsets_[shndx];
1419 // Get the section contents. Upon return, if IS_NEW is true, the memory
1420 // has been allocated via new; if false, the memory is part of the mapped
1421 // input file, and we will need to duplicate it so that it will persist
1422 // after we close the input file.
1423 section_size_type len;
1425 const unsigned char* contents = this->section_contents(shndx, &len, &is_new);
1427 if (section_id == elfcpp::DW_SECT_STR_OFFSETS)
1429 const unsigned char* remapped = this->remap_str_offsets(contents, len);
1432 contents = remapped;
1436 unsigned char* copy = new unsigned char[len];
1437 memcpy(copy, contents, len);
1441 // Add the contents of the input section to the output section.
1442 // The output file takes ownership of the memory pointed to by CONTENTS.
1443 section_offset_type off = output_file->add_contribution(section_id, contents,
1446 // Store the output section bounds.
1447 Section_bounds bounds(off, len);
1448 this->sect_offsets_[shndx] = bounds;
1454 const unsigned char*
1455 Dwo_file::remap_str_offsets(const unsigned char* contents,
1456 section_size_type len)
1459 gold_fatal(_("%s: .debug_str_offsets.dwo section size not a multiple of 4"),
1462 if (this->obj_->is_big_endian())
1463 return this->sized_remap_str_offsets<true>(contents, len);
1465 return this->sized_remap_str_offsets<false>(contents, len);
1468 template <bool big_endian>
1469 const unsigned char*
1470 Dwo_file::sized_remap_str_offsets(const unsigned char* contents,
1471 section_size_type len)
1473 unsigned char* remapped = new unsigned char[len];
1474 const unsigned char* p = contents;
1475 unsigned char* q = remapped;
1478 unsigned int val = elfcpp::Swap_unaligned<32, big_endian>::readval(p);
1479 val = this->remap_str_offset(val);
1480 elfcpp::Swap_unaligned<32, big_endian>::writeval(q, val);
1489 Dwo_file::remap_str_offset(section_offset_type val)
1491 Str_offset_map_entry entry;
1494 Str_offset_map::const_iterator p =
1495 std::lower_bound(this->str_offset_map_.begin(),
1496 this->str_offset_map_.end(),
1497 entry, Offset_compare());
1499 if (p == this->str_offset_map_.end() || p->first > val)
1501 if (p == this->str_offset_map_.begin())
1504 gold_assert(p->first <= val);
1507 return p->second + (val - p->first);
1510 // Add a set of .debug_info.dwo or .debug_types.dwo and related sections
1514 Dwo_file::add_unit_set(Dwp_output_file* output_file, unsigned int *debug_shndx,
1515 bool is_debug_types)
1517 unsigned int shndx = (is_debug_types
1518 ? debug_shndx[elfcpp::DW_SECT_TYPES]
1519 : debug_shndx[elfcpp::DW_SECT_INFO]);
1521 gold_assert(shndx != 0);
1523 if (debug_shndx[elfcpp::DW_SECT_ABBREV] == 0)
1524 gold_fatal(_("%s: no .debug_abbrev.dwo section found"), this->name_);
1526 // Copy the related sections and track the section offsets and sizes.
1527 Section_bounds sections[elfcpp::DW_SECT_MAX + 1];
1528 for (int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i)
1530 if (debug_shndx[i] > 0)
1531 sections[i] = this->copy_section(output_file, debug_shndx[i],
1532 static_cast<elfcpp::DW_SECT>(i));
1535 // Parse the .debug_info or .debug_types section and add each compilation
1536 // or type unit to the output file, along with the contributions to the
1537 // related sections.
1538 Unit_reader reader(is_debug_types, this->obj_, shndx);
1539 reader.add_units(output_file, debug_shndx[elfcpp::DW_SECT_ABBREV], sections);
1542 // Class Dwp_output_file.
1544 // Record the target info from an input file. On first call, we
1545 // set the ELF header values for the output file. On subsequent
1546 // calls, we just verify that the values match.
1549 Dwp_output_file::record_target_info(const char*, int machine,
1550 int size, bool big_endian,
1551 int osabi, int abiversion)
1553 // TODO: Check the values on subsequent calls.
1554 if (this->size_ > 0)
1557 this->machine_ = machine;
1559 this->big_endian_ = big_endian;
1560 this->osabi_ = osabi;
1561 this->abiversion_ = abiversion;
1564 this->next_file_offset_ = elfcpp::Elf_sizes<32>::ehdr_size;
1565 else if (size == 64)
1566 this->next_file_offset_ = elfcpp::Elf_sizes<64>::ehdr_size;
1570 this->fd_ = ::fopen(this->name_, "wb");
1571 if (this->fd_ == NULL)
1572 gold_fatal(_("%s: %s"), this->name_, strerror(errno));
1574 // Write zeroes for the ELF header initially. We'll write
1575 // the actual header during finalize().
1576 static const char buf[elfcpp::Elf_sizes<64>::ehdr_size] = { 0 };
1577 if (::fwrite(buf, 1, this->next_file_offset_, this->fd_)
1578 < (size_t) this->next_file_offset_)
1579 gold_fatal(_("%s: %s"), this->name_, strerror(errno));
1582 // Add a string to the debug strings section.
1585 Dwp_output_file::add_string(const char* str, size_t len)
1587 Stringpool::Key key;
1588 this->stringpool_.add_with_length(str, len, true, &key);
1589 this->have_strings_ = true;
1590 // We aren't supposed to call get_offset() until after
1591 // calling set_string_offsets(), but the offsets will
1592 // not change unless optimizing the string pool.
1593 return this->stringpool_.get_offset_from_key(key);
1596 // Align the file offset to the given boundary.
1599 align_offset(off_t off, int align)
1601 return (off + align - 1) & ~(align - 1);
1604 // Add a new output section and return the section index.
1607 Dwp_output_file::add_output_section(const char* section_name, int align)
1609 Section sect(section_name, align);
1610 this->sections_.push_back(sect);
1611 return this->shnum_++;
1614 // Add a contribution to a section in the output file, and return the offset
1615 // of the contribution within the output section. The .debug_info.dwo section
1616 // is expected to be the largest one, so we will write the contents of this
1617 // section directly to the output file as we receive contributions, allowing
1618 // us to free that memory as soon as possible. We will save the remaining
1619 // contributions until we finalize the layout of the output file.
1622 Dwp_output_file::add_contribution(elfcpp::DW_SECT section_id,
1623 const unsigned char* contents,
1624 section_size_type len,
1627 const char* section_name = get_dwarf_section_name(section_id);
1628 gold_assert(static_cast<size_t>(section_id) < this->section_id_map_.size());
1629 unsigned int shndx = this->section_id_map_[section_id];
1631 // Create the section if necessary.
1634 section_name = this->shstrtab_.add_with_length(section_name,
1635 strlen(section_name),
1637 shndx = this->add_output_section(section_name, align);
1638 this->section_id_map_[section_id] = shndx;
1641 Section& section = this->sections_[shndx - 1];
1643 section_offset_type section_offset;
1645 if (section_id == elfcpp::DW_SECT_INFO)
1647 // Write the .debug_info.dwo section directly.
1648 // We do not need to free the memory in this case.
1649 off_t file_offset = this->next_file_offset_;
1650 gold_assert(this->size_ > 0 && file_offset > 0);
1652 file_offset = align_offset(file_offset, align);
1653 if (section.offset == 0)
1654 section.offset = file_offset;
1656 if (align > section.align)
1658 // Since we've already committed to the layout for this
1659 // section, an unexpected large alignment boundary may
1660 // be impossible to honor.
1661 if (align_offset(section.offset, align) != section.offset)
1662 gold_fatal(_("%s: alignment (%d) for section '%s' "
1663 "cannot be honored"),
1664 this->name_, align, section_name);
1665 section.align = align;
1668 section_offset = file_offset - section.offset;
1669 section.size = file_offset + len - section.offset;
1671 ::fseek(this->fd_, file_offset, SEEK_SET);
1672 if (::fwrite(contents, 1, len, this->fd_) < len)
1673 gold_fatal(_("%s: error writing section '%s'"), this->name_,
1675 this->next_file_offset_ = file_offset + len;
1679 // Collect the contributions and keep track of the total size.
1680 if (align > section.align)
1681 section.align = align;
1682 section_offset = align_offset(section.size, align);
1683 section.size = section_offset + len;
1684 Contribution contrib = { section_offset, len, contents };
1685 section.contributions.push_back(contrib);
1688 return section_offset;
1691 // Add a set of .debug_info and related sections to the output file.
1694 Dwp_output_file::add_cu_set(Unit_set* cu_set)
1696 uint64_t dwo_id = cu_set->signature;
1698 if (!this->cu_index_.find_or_add(dwo_id, &slot))
1699 this->cu_index_.enter_set(slot, cu_set);
1701 gold_warning(_("%s: duplicate entry for CU (dwo_id 0x%llx)"),
1702 this->name_, (unsigned long long)dwo_id);
1705 // Lookup a type signature and return TRUE if we have already seen it.
1707 Dwp_output_file::lookup_tu(uint64_t type_sig)
1709 this->last_type_sig_ = type_sig;
1710 return this->tu_index_.find_or_add(type_sig, &this->last_tu_slot_);
1713 // Add a set of .debug_types and related sections to the output file.
1716 Dwp_output_file::add_tu_set(Unit_set* tu_set)
1718 uint64_t type_sig = tu_set->signature;
1720 if (type_sig == this->last_type_sig_)
1721 slot = this->last_tu_slot_;
1723 this->tu_index_.find_or_add(type_sig, &slot);
1724 this->tu_index_.enter_set(slot, tu_set);
1727 // Find a slot in the hash table for SIGNATURE. Return TRUE
1728 // if the entry already exists.
1731 Dwp_output_file::Dwp_index::find_or_add(uint64_t signature,
1732 unsigned int* slotp)
1734 if (this->capacity_ == 0)
1737 static_cast<unsigned int>(signature) & (this->capacity_ - 1);
1738 unsigned int secondary_hash;
1739 uint64_t probe = this->hash_table_[slot];
1740 uint32_t row_index = this->index_table_[slot];
1741 if (row_index != 0 && probe != signature)
1743 secondary_hash = (static_cast<unsigned int>(signature >> 32)
1744 & (this->capacity_ - 1)) | 1;
1747 slot = (slot + secondary_hash) & (this->capacity_ - 1);
1748 probe = this->hash_table_[slot];
1749 row_index = this->index_table_[slot];
1750 } while (row_index != 0 && probe != signature);
1753 return (row_index != 0);
1756 // Enter a CU or TU set at the given SLOT in the hash table.
1759 Dwp_output_file::Dwp_index::enter_set(unsigned int slot,
1760 const Unit_set* set)
1762 gold_assert(slot < this->capacity_);
1764 // Add a row to the offsets and sizes tables.
1765 this->section_table_.push_back(set);
1766 uint32_t row_index = this->section_table_rows();
1768 // Mark the sections used in this set.
1769 for (unsigned int i = 1; i <= elfcpp::DW_SECT_MAX; i++)
1770 if (set->sections[i].size > 0)
1771 this->section_mask_ |= 1 << i;
1773 // Enter the signature and pool index into the hash table.
1774 gold_assert(this->hash_table_[slot] == 0);
1775 this->hash_table_[slot] = set->signature;
1776 this->index_table_[slot] = row_index;
1779 // Grow the hash table when we exceed 2/3 capacity.
1780 if (this->used_ * 3 > this->capacity_ * 2)
1784 // Initialize the hash table.
1787 Dwp_output_file::Dwp_index::initialize()
1789 this->capacity_ = 16;
1790 this->hash_table_ = new uint64_t[this->capacity_];
1791 memset(this->hash_table_, 0, this->capacity_ * sizeof(uint64_t));
1792 this->index_table_ = new uint32_t[this->capacity_];
1793 memset(this->index_table_, 0, this->capacity_ * sizeof(uint32_t));
1796 // Grow the hash table when we reach 2/3 capacity.
1799 Dwp_output_file::Dwp_index::grow()
1801 unsigned int old_capacity = this->capacity_;
1802 uint64_t* old_hash_table = this->hash_table_;
1803 uint32_t* old_index_table = this->index_table_;
1804 unsigned int old_used = this->used_;
1806 this->capacity_ = old_capacity * 2;
1807 this->hash_table_ = new uint64_t[this->capacity_];
1808 memset(this->hash_table_, 0, this->capacity_ * sizeof(uint64_t));
1809 this->index_table_ = new uint32_t[this->capacity_];
1810 memset(this->index_table_, 0, this->capacity_ * sizeof(uint32_t));
1813 for (unsigned int i = 0; i < old_capacity; ++i)
1815 uint64_t signature = old_hash_table[i];
1816 uint32_t row_index = old_index_table[i];
1820 bool found = this->find_or_add(signature, &slot);
1821 gold_assert(!found);
1822 this->hash_table_[slot] = signature;
1823 this->index_table_[slot] = row_index;
1827 gold_assert(this->used_ == old_used);
1829 delete[] old_hash_table;
1830 delete[] old_index_table;
1833 // Finalize the file, write the string tables and index sections,
1834 // and close the file.
1837 Dwp_output_file::finalize()
1841 // Write the accumulated output sections.
1842 for (unsigned int i = 0; i < this->sections_.size(); i++)
1844 Section& sect = this->sections_[i];
1845 // If the offset has already been assigned, the section has been written.
1846 if (sect.offset > 0 || sect.size == 0)
1848 off_t file_offset = this->next_file_offset_;
1849 file_offset = align_offset(file_offset, sect.align);
1850 sect.offset = file_offset;
1851 this->write_contributions(sect);
1852 this->next_file_offset_ = file_offset + sect.size;
1855 // Write the debug string table.
1856 if (this->have_strings_)
1858 this->stringpool_.set_string_offsets();
1859 section_size_type len = this->stringpool_.get_strtab_size();
1860 buf = new unsigned char[len];
1861 this->stringpool_.write_to_buffer(buf, len);
1862 this->write_new_section(".debug_str.dwo", buf, len, 1);
1866 // Write the CU and TU indexes.
1867 if (this->big_endian_)
1869 this->write_index<true>(".debug_cu_index", this->cu_index_);
1870 this->write_index<true>(".debug_tu_index", this->tu_index_);
1874 this->write_index<false>(".debug_cu_index", this->cu_index_);
1875 this->write_index<false>(".debug_tu_index", this->tu_index_);
1878 off_t file_offset = this->next_file_offset_;
1880 // Write the section string table.
1881 this->shstrndx_ = this->shnum_++;
1882 const char* shstrtab_name =
1883 this->shstrtab_.add_with_length(".shstrtab", sizeof(".shstrtab") - 1,
1885 this->shstrtab_.set_string_offsets();
1886 section_size_type shstrtab_len = this->shstrtab_.get_strtab_size();
1887 buf = new unsigned char[shstrtab_len];
1888 this->shstrtab_.write_to_buffer(buf, shstrtab_len);
1889 off_t shstrtab_off = file_offset;
1890 ::fseek(this->fd_, file_offset, 0);
1891 if (::fwrite(buf, 1, shstrtab_len, this->fd_) < shstrtab_len)
1892 gold_fatal(_("%s: error writing section '.shstrtab'"), this->name_);
1894 file_offset += shstrtab_len;
1896 // Write the section header table. The first entry is a NULL entry.
1897 // This is followed by the debug sections, and finally we write the
1898 // .shstrtab section header.
1899 file_offset = align_offset(file_offset, this->size_ == 32 ? 4 : 8);
1900 this->shoff_ = file_offset;
1901 ::fseek(this->fd_, file_offset, 0);
1902 section_size_type sh0_size = 0;
1903 unsigned int sh0_link = 0;
1904 if (this->shnum_ >= elfcpp::SHN_LORESERVE)
1905 sh0_size = this->shnum_;
1906 if (this->shstrndx_ >= elfcpp::SHN_LORESERVE)
1907 sh0_link = this->shstrndx_;
1908 this->write_shdr(NULL, 0, 0, 0, 0, sh0_size, sh0_link, 0, 0, 0);
1909 for (unsigned int i = 0; i < this->sections_.size(); ++i)
1911 Section& sect = this->sections_[i];
1912 this->write_shdr(sect.name, elfcpp::SHT_PROGBITS, 0, 0, sect.offset,
1913 sect.size, 0, 0, sect.align, 0);
1915 this->write_shdr(shstrtab_name, elfcpp::SHT_STRTAB, 0, 0,
1916 shstrtab_off, shstrtab_len, 0, 0, 1, 0);
1918 // Write the ELF header.
1922 if (this->fd_ != NULL)
1924 if (::fclose(this->fd_) != 0)
1925 gold_fatal(_("%s: %s"), this->name_, strerror(errno));
1930 // Write the contributions to an output section.
1933 Dwp_output_file::write_contributions(const Section& sect)
1935 for (unsigned int i = 0; i < sect.contributions.size(); ++i)
1937 const Contribution& c = sect.contributions[i];
1938 ::fseek(this->fd_, sect.offset + c.output_offset, SEEK_SET);
1939 if (::fwrite(c.contents, 1, c.size, this->fd_) < c.size)
1940 gold_fatal(_("%s: error writing section '%s'"), this->name_, sect.name);
1941 delete[] c.contents;
1945 // Write a new section to the output file.
1948 Dwp_output_file::write_new_section(const char* section_name,
1949 const unsigned char* contents,
1950 section_size_type len, int align)
1952 section_name = this->shstrtab_.add_with_length(section_name,
1953 strlen(section_name),
1955 unsigned int shndx = this->add_output_section(section_name, align);
1956 Section& section = this->sections_[shndx - 1];
1957 off_t file_offset = this->next_file_offset_;
1958 file_offset = align_offset(file_offset, align);
1959 section.offset = file_offset;
1961 ::fseek(this->fd_, file_offset, SEEK_SET);
1962 if (::fwrite(contents, 1, len, this->fd_) < len)
1963 gold_fatal(_("%s: error writing section '%s'"), this->name_, section_name);
1964 this->next_file_offset_ = file_offset + len;
1967 // Write a CU or TU index section.
1969 template<bool big_endian>
1971 Dwp_output_file::write_index(const char* sect_name, const Dwp_index& index)
1973 const unsigned int nslots = index.hash_table_total_slots();
1974 const unsigned int nused = index.hash_table_used_slots();
1975 const unsigned int nrows = index.section_table_rows();
1977 int column_mask = index.section_table_cols();
1978 unsigned int ncols = 0;
1979 for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c)
1980 if (column_mask & (1 << c))
1982 const unsigned int ntable = (nrows * 2 + 1) * ncols;
1984 const section_size_type index_size = (4 * sizeof(uint32_t)
1985 + nslots * sizeof(uint64_t)
1986 + nslots * sizeof(uint32_t)
1987 + ntable * sizeof(uint32_t));
1989 // Allocate a buffer for the section contents.
1990 unsigned char* buf = new unsigned char[index_size];
1991 unsigned char* p = buf;
1993 // Write the section header: version number, padding,
1994 // number of used slots and total number of slots.
1995 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, 2);
1996 p += sizeof(uint32_t);
1997 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, ncols);
1998 p += sizeof(uint32_t);
1999 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, nused);
2000 p += sizeof(uint32_t);
2001 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, nslots);
2002 p += sizeof(uint32_t);
2004 // Write the hash table.
2005 for (unsigned int i = 0; i < nslots; ++i)
2007 elfcpp::Swap_unaligned<64, big_endian>::writeval(p, index.hash_table(i));
2008 p += sizeof(uint64_t);
2011 // Write the parallel index table.
2012 for (unsigned int i = 0; i < nslots; ++i)
2014 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, index.index_table(i));
2015 p += sizeof(uint32_t);
2018 // Write the first row of the table of section offsets.
2019 for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c)
2021 if (column_mask & (1 << c))
2023 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, c);
2024 p += sizeof(uint32_t);
2028 // Write the table of section offsets.
2029 Dwp_index::Section_table::const_iterator tbl = index.section_table();
2030 for (unsigned int r = 0; r < nrows; ++r)
2032 gold_assert(tbl != index.section_table_end());
2033 const Section_bounds* sects = (*tbl)->sections;
2034 for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c)
2036 if (column_mask & (1 << c))
2038 section_offset_type offset = sects[c].offset;
2039 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, offset);
2040 p += sizeof(uint32_t);
2043 gold_assert(sects[c].size == 0);
2048 // Write the table of section sizes.
2049 tbl = index.section_table();
2050 for (unsigned int r = 0; r < nrows; ++r)
2052 gold_assert(tbl != index.section_table_end());
2053 const Section_bounds* sects = (*tbl)->sections;
2054 for (unsigned int c = 1; c <= elfcpp::DW_SECT_MAX; ++c)
2056 if (column_mask & (1 << c))
2058 section_size_type size = sects[c].size;
2059 elfcpp::Swap_unaligned<32, big_endian>::writeval(p, size);
2060 p += sizeof(uint32_t);
2063 gold_assert(sects[c].size == 0);
2068 gold_assert(p == buf + index_size);
2070 this->write_new_section(sect_name, buf, index_size, sizeof(uint64_t));
2075 // Write the ELF header.
2078 Dwp_output_file::write_ehdr()
2080 if (this->size_ == 32)
2082 if (this->big_endian_)
2083 return this->sized_write_ehdr<32, true>();
2085 return this->sized_write_ehdr<32, false>();
2087 else if (this->size_ == 64)
2089 if (this->big_endian_)
2090 return this->sized_write_ehdr<64, true>();
2092 return this->sized_write_ehdr<64, false>();
2098 template<unsigned int size, bool big_endian>
2100 Dwp_output_file::sized_write_ehdr()
2102 const unsigned int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size;
2103 unsigned char buf[ehdr_size];
2104 elfcpp::Ehdr_write<size, big_endian> ehdr(buf);
2106 unsigned char e_ident[elfcpp::EI_NIDENT];
2107 memset(e_ident, 0, elfcpp::EI_NIDENT);
2108 e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0;
2109 e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1;
2110 e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2;
2111 e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3;
2113 e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32;
2114 else if (size == 64)
2115 e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64;
2118 e_ident[elfcpp::EI_DATA] = (big_endian
2119 ? elfcpp::ELFDATA2MSB
2120 : elfcpp::ELFDATA2LSB);
2121 e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT;
2122 ehdr.put_e_ident(e_ident);
2124 ehdr.put_e_type(elfcpp::ET_REL);
2125 ehdr.put_e_machine(this->machine_);
2126 ehdr.put_e_version(elfcpp::EV_CURRENT);
2127 ehdr.put_e_entry(0);
2128 ehdr.put_e_phoff(0);
2129 ehdr.put_e_shoff(this->shoff_);
2130 ehdr.put_e_flags(0);
2131 ehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size);
2132 ehdr.put_e_phentsize(0);
2133 ehdr.put_e_phnum(0);
2134 ehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size);
2135 ehdr.put_e_shnum(this->shnum_ < elfcpp::SHN_LORESERVE ? this->shnum_ : 0);
2136 ehdr.put_e_shstrndx(this->shstrndx_ < elfcpp::SHN_LORESERVE
2138 : static_cast<unsigned int>(elfcpp::SHN_XINDEX));
2140 ::fseek(this->fd_, 0, 0);
2141 if (::fwrite(buf, 1, ehdr_size, this->fd_) < ehdr_size)
2142 gold_fatal(_("%s: error writing ELF header"), this->name_);
2145 // Write a section header.
2148 Dwp_output_file::write_shdr(const char* name, unsigned int type,
2149 unsigned int flags, uint64_t addr, off_t offset,
2150 section_size_type sect_size, unsigned int link,
2151 unsigned int info, unsigned int align,
2152 unsigned int ent_size)
2154 if (this->size_ == 32)
2156 if (this->big_endian_)
2157 return this->sized_write_shdr<32, true>(name, type, flags, addr,
2158 offset, sect_size, link, info,
2161 return this->sized_write_shdr<32, false>(name, type, flags, addr,
2162 offset, sect_size, link, info,
2165 else if (this->size_ == 64)
2167 if (this->big_endian_)
2168 return this->sized_write_shdr<64, true>(name, type, flags, addr,
2169 offset, sect_size, link, info,
2172 return this->sized_write_shdr<64, false>(name, type, flags, addr,
2173 offset, sect_size, link, info,
2180 template<unsigned int size, bool big_endian>
2182 Dwp_output_file::sized_write_shdr(const char* name, unsigned int type,
2183 unsigned int flags, uint64_t addr,
2184 off_t offset, section_size_type sect_size,
2185 unsigned int link, unsigned int info,
2186 unsigned int align, unsigned int ent_size)
2188 const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
2189 unsigned char buf[shdr_size];
2190 elfcpp::Shdr_write<size, big_endian> shdr(buf);
2192 shdr.put_sh_name(name == NULL ? 0 : this->shstrtab_.get_offset(name));
2193 shdr.put_sh_type(type);
2194 shdr.put_sh_flags(flags);
2195 shdr.put_sh_addr(addr);
2196 shdr.put_sh_offset(offset);
2197 shdr.put_sh_size(sect_size);
2198 shdr.put_sh_link(link);
2199 shdr.put_sh_info(info);
2200 shdr.put_sh_addralign(align);
2201 shdr.put_sh_entsize(ent_size);
2202 if (::fwrite(buf, 1, shdr_size, this->fd_) < shdr_size)
2203 gold_fatal(_("%s: error writing section header table"), this->name_);
2206 // Class Dwo_name_info_reader.
2208 // Visit a compilation unit.
2211 Dwo_name_info_reader::visit_compilation_unit(off_t, off_t, Dwarf_die* die)
2213 const char* dwo_name = die->string_attribute(elfcpp::DW_AT_GNU_dwo_name);
2214 if (dwo_name != NULL)
2216 uint64_t dwo_id = die->uint_attribute(elfcpp::DW_AT_GNU_dwo_id);
2217 this->files_->push_back(Dwo_file_entry(dwo_id, dwo_name));
2221 // Class Unit_reader.
2223 // Read the CUs or TUs and add them to the output file.
2226 Unit_reader::add_units(Dwp_output_file* output_file,
2227 unsigned int debug_abbrev,
2228 Section_bounds* sections)
2230 this->output_file_ = output_file;
2231 this->sections_ = sections;
2232 this->set_abbrev_shndx(debug_abbrev);
2236 // Visit a compilation unit.
2239 Unit_reader::visit_compilation_unit(off_t, off_t cu_length, Dwarf_die* die)
2244 Unit_set* unit_set = new Unit_set();
2245 unit_set->signature = die->uint_attribute(elfcpp::DW_AT_GNU_dwo_id);
2246 for (unsigned int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i)
2247 unit_set->sections[i] = this->sections_[i];
2249 // Dwp_output_file::add_contribution writes the .debug_info.dwo section
2250 // directly to the output file, so we do not need to duplicate the
2251 // section contents, and add_contribution does not need to free the memory.
2252 section_offset_type off =
2253 this->output_file_->add_contribution(elfcpp::DW_SECT_INFO,
2254 this->buffer_at_offset(0),
2256 Section_bounds bounds(off, cu_length);
2257 unit_set->sections[elfcpp::DW_SECT_INFO] = bounds;
2258 this->output_file_->add_cu_set(unit_set);
2261 // Visit a type unit.
2264 Unit_reader::visit_type_unit(off_t, off_t tu_length, off_t,
2265 uint64_t signature, Dwarf_die*)
2269 if (this->output_file_->lookup_tu(signature))
2272 Unit_set* unit_set = new Unit_set();
2273 unit_set->signature = signature;
2274 for (unsigned int i = elfcpp::DW_SECT_ABBREV; i <= elfcpp::DW_SECT_MAX; ++i)
2275 unit_set->sections[i] = this->sections_[i];
2277 unsigned char* contents = new unsigned char[tu_length];
2278 memcpy(contents, this->buffer_at_offset(0), tu_length);
2279 section_offset_type off =
2280 this->output_file_->add_contribution(elfcpp::DW_SECT_TYPES, contents,
2282 Section_bounds bounds(off, tu_length);
2283 unit_set->sections[elfcpp::DW_SECT_TYPES] = bounds;
2284 this->output_file_->add_tu_set(unit_set);
2287 }; // End namespace gold
2289 using namespace gold;
2294 VERIFY_ONLY = 0x101,
2297 struct option dwp_options[] =
2299 { "exec", required_argument, NULL, 'e' },
2300 { "help", no_argument, NULL, 'h' },
2301 { "output", required_argument, NULL, 'o' },
2302 { "verbose", no_argument, NULL, 'v' },
2303 { "verify-only", no_argument, NULL, VERIFY_ONLY },
2304 { "version", no_argument, NULL, 'V' },
2305 { NULL, 0, NULL, 0 }
2308 // Print usage message and exit.
2311 usage(FILE* fd, int exit_status)
2313 fprintf(fd, _("Usage: %s [options] [file...]\n"), program_name);
2314 fprintf(fd, _(" -h, --help Print this help message\n"));
2315 fprintf(fd, _(" -e EXE, --exec EXE Get list of dwo files from EXE"
2316 " (defaults output to EXE.dwp)\n"));
2317 fprintf(fd, _(" -o FILE, --output FILE Set output dwp file name\n"));
2318 fprintf(fd, _(" -v, --verbose Verbose output\n"));
2319 fprintf(fd, _(" --verify-only Verify output file against"
2321 fprintf(fd, _(" -V, --version Print version number\n"));
2323 // REPORT_BUGS_TO is defined in bfd/bfdver.h.
2324 const char* report = REPORT_BUGS_TO;
2325 if (*report != '\0')
2326 fprintf(fd, _("\nReport bugs to %s\n"), report);
2330 // Report version information.
2335 // This output is intended to follow the GNU standards.
2336 printf("GNU dwp %s\n", BFD_VERSION_STRING);
2337 printf(_("Copyright (C) 2016 Free Software Foundation, Inc.\n"));
2339 This program is free software; you may redistribute it under the terms of\n\
2340 the GNU General Public License version 3 or (at your option) any later version.\n\
2341 This program has absolutely no warranty.\n"));
2348 main(int argc, char** argv)
2350 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
2351 setlocale(LC_MESSAGES, "");
2353 #if defined (HAVE_SETLOCALE)
2354 setlocale(LC_CTYPE, "");
2356 bindtextdomain(PACKAGE, LOCALEDIR);
2357 textdomain(PACKAGE);
2359 program_name = argv[0];
2361 // Initialize the global parameters, to let random code get to the
2363 Errors errors(program_name);
2364 set_parameters_errors(&errors);
2366 // Initialize gold's global options. We don't use these in
2367 // this program, but they need to be initialized so that
2368 // functions we call from libgold work properly.
2369 General_options options;
2370 set_parameters_options(&options);
2372 // In libiberty; expands @filename to the args in "filename".
2373 expandargv(&argc, &argv);
2375 // Collect file names and options.
2377 std::string output_filename;
2378 const char* exe_filename = NULL;
2379 bool verbose = false;
2380 bool verify_only = false;
2382 while ((c = getopt_long(argc, argv, "e:ho:vV", dwp_options, NULL)) != -1)
2387 usage(stdout, EXIT_SUCCESS);
2389 exe_filename = optarg;
2392 output_filename.assign(optarg);
2404 usage(stderr, EXIT_FAILURE);
2408 if (output_filename.empty())
2410 if (exe_filename == NULL)
2411 gold_fatal(_("no output file specified"));
2412 output_filename.assign(exe_filename);
2413 output_filename.append(".dwp");
2416 // Get list of .dwo files from the executable.
2417 if (exe_filename != NULL)
2419 Dwo_file exe_file(exe_filename);
2420 exe_file.read_executable(&files);
2423 // Add any additional files listed on command line.
2424 for (int i = optind; i < argc; ++i)
2425 files.push_back(Dwo_file_entry(0, argv[i]));
2427 if (exe_filename == NULL && files.empty())
2428 gold_fatal(_("no input files and no executable specified"));
2432 // Get list of DWO files in the DWP file and compare with
2433 // references found in the EXE file.
2434 Dwo_file dwp_file(output_filename.c_str());
2435 bool ok = dwp_file.verify(files);
2436 return ok ? EXIT_SUCCESS : EXIT_FAILURE;
2439 // Process each file, adding its contents to the output file.
2440 Dwp_output_file output_file(output_filename.c_str());
2441 for (File_list::const_iterator f = files.begin(); f != files.end(); ++f)
2444 fprintf(stderr, "%s\n", f->dwo_name.c_str());
2445 Dwo_file dwo_file(f->dwo_name.c_str());
2446 dwo_file.read(&output_file);
2448 output_file.finalize();
2450 return EXIT_SUCCESS;